Mason Street Industries LLC
NPI 1215805536 · Neurology Physician · Greenwich, CT
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mason Street Industries LLC is a Neurology Physician organization in Greenwich, CT (NPI 1215805536).
Provider details
- NPI number
- 1215805536
- Entity type
- Organization
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- David Hahn, President(718) 514-0224
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-10-28
- Last updated
- 2025-10-28
- Certified
- 2025-10-28
Frequently asked questions
- What is Mason Street Industries LLC's NPI number?
- Mason Street Industries LLC's National Provider Identifier (NPI) is 1215805536, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mason Street Industries LLC?
- Mason Street Industries LLC is classified in the NPPES registry as Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Mason Street Industries LLC located?
- Mason Street Industries LLC's practice location on file with NPPES is 115 Mason St Ste 1, Greenwich, CT 06830-6630.
- What is Mason Street Industries LLC's phone number?
- The practice phone number listed in the NPPES registry for Mason Street Industries LLC is (718) 514-0224.
- Does Mason Street Industries LLC accept Medicare?
- Mason Street Industries LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mason Street Industries LLC?
- The authorized official listed on Mason Street Industries LLC's NPPES record is David Hahn, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mason Street Industries LLC's NPI active?
- Yes — Mason Street Industries LLC's NPI (1215805536) is active in the NPPES registry as of the last update on 2025-10-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.